GB2212515A - Treatment of aqueous radioactive waste solutions - Google Patents
Treatment of aqueous radioactive waste solutions Download PDFInfo
- Publication number
- GB2212515A GB2212515A GB8825882A GB8825882A GB2212515A GB 2212515 A GB2212515 A GB 2212515A GB 8825882 A GB8825882 A GB 8825882A GB 8825882 A GB8825882 A GB 8825882A GB 2212515 A GB2212515 A GB 2212515A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- evaporator
- housing
- radioactive waste
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000002901 radioactive waste Substances 0.000 title claims description 9
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000001704 evaporation Methods 0.000 claims abstract description 11
- 230000008020 evaporation Effects 0.000 claims abstract description 11
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 10
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 5
- 230000002285 radioactive effect Effects 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 5
- 150000002484 inorganic compounds Chemical group 0.000 abstract description 3
- 229910010272 inorganic material Inorganic materials 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 22
- 239000007788 liquid Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0017—Use of electrical or wave energy
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/006—Radioactive compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- High Energy & Nuclear Physics (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
In the treatment of an aqueous radioactive solution, the solution is concentrated by evaporation in order to reduce its volume and an electrolytic process is performed during evaporation of the waste solution to produce electrochemical decomposition. The process is effected in an evaporator (1) accommodating the waste solution, heated by a heat exchanger 7 and constructed as an electrolysis cell with anodes (3, 13). A more effective decomposition of inorganic compound in the aqueous radioactive solution is achieved. <IMAGE>
Description
TREATMENT OF AQUEOUS RADIOACTIVE WASTE SOLUTIONS
The invention relates to a method and apparatus for the treatment of aqueous radioactive waste solutions.
Radioactive liquids such as for example decontamination liquids or other aqueous radioactive waste solutions are often subjected to electrochemical decomposition (DE 24 49 588 C2). Subsequent evaporation of liquids which is intended to produce a substantial reduction in the quantities of waste which finally have to be stored can then be carried out with the minimum of difficulty (EP 01 62 356
Al).
Electrochemical decomposition of organic and inorganic contents has proved its value in respect of many radioactive aqueous solutions.
According to one aspect of the invention, there is provided a method for the treatment of an aqueous radioactive waste solution comprising concentration by evaporation in order to reduce its volume and effecting an electrolytic process during evaporation of the solution to obtain electrochemical decomposition.
Such a method can obtain a more effective decomposition of inorganic compounds of aqueous radioactive solutions at a reduced cost.
According to another aspect of the invention there is provided apparatus for treating an aqueous radioactive waste solution and comprising an evaporator which can accommodate the solution to be treated and which is constructed as an electrolysis cell.
Electrochemical treatment of the liquid phase in the evaporator can result in an effective decomposition of disturbing compounds in the particular radioactive solution in question. For example, inorganic compounds of low vapour pressure can be electrochemically decomposed to produce inert gas and H20. Simultaneous electrochemical treatment and evaporation of the radioactive solution simplifies conduct of the process.
The integrated construction of an evaporator as an electrolytic apparatus can facilitate the process cycle and reduce the cost of the equipment.
Preferably a housing of the evaporator is connected as the cathode and anodes are provided which project into the space in the evaporation housing to receive the solution.
Advantageously, a feed pipe for the solution to be evaporated projects into the evaporator housing and has its outlet end disposed just above the bottom of the housing. Thus fresh waste solution will be supplied a long way beneath the surface of the liquid which is exposed to evaporation. The fresh solution is then able to rise at the anodes and so be subjected to electrochemical decomposition. Thus, the waste solution has adequate time for electrochemical decomposition while electrochemically decomposed solution which has already risen can evaporate at the same time.
The invention is diagrammatically illustrated by way of example in the accompanying drawing which shows one embodiment of an evaporation housing constructed as an electrolysis cell according to the invention.
Referring to the drawing an evaporator comprises a cylindrical evaporator housing 1 of high grade steel which is connected as a cathode. A concentric anode 3 is disposed in a liquid chamber of the evaporator 1. Preferably, the anode is formed of titanium and it may be constructed as an expanded or perforated plate.
Disposed in the upper region of the evaporator housing 1 is a feed pipe 4 for solution which is to be evaporated, the feed pipe 4 projecting into the solution and having its outlet end 2 disposed just above the bottom of the housing. A pipe 5 extends horizontally laterally of the evaporator housing and in the lower region to a heat exchanger 7 at a level below the surface 9 of the liquid in the housing 1 and back to the housing. The heat exchanger 7 is heated by a heating medium supplied via coiled pipes 11. Natural circulation is provided within the pipeline 5 connected to the heat exchanger 7.
An anode core 13 is disposed in the lower portion of the pipeline 5.
The evaporator 1 extends upwardly to a connecting piece 15 which is provided with a demister 17 to trap aerosols. Vapour is passed to a cooler 21 via a pipeline 19. Distillate is drawn off via a pipeline 23.
The apparatus described functions in the following way:
Via the feed pipe 4, a radioactive solution with inorganic contents is fed into the evaporator housing 1. An electrical voltage is applied between the anode 3 and the housing 1 forming a cathode via respective connections 25 and 27. Voltage is also applied between the housing 1 and the cathode 13. Control of the electrolysis process can be effected by maintaining the current or voltage constant. The radioactive solution is heated by the heat exchanger 7 to a temperature of about 1000C. The solution vaporizes once the inorganic contents have been electrochemically decomposed. The distillate is drawn off from the cooler 21 and passed to subsequent units in the process.
Remaining in the evaporator is a concentrated solution which can likewise be discharged for further treatment.
Claims (5)
1. A method for the treatment of an aqueous radioactive waste solution comprising concentration by evaporation in order to reduce its volume and effecting an electrolytic process during evaporation of the solution to obtain electrochemical decomposition.
2. Apparatus for treating an aqueous radioactive waste solution and comprising an evaporator which can accommodate the solution to be treated and which is constructed as an electrolysis cell.
3. Apparatus according to Claim 2, in which a housing of the evaporator is connected as the cathode and there are in the evaporator housing anodes which project into the space therein to receive the solution.
4. Apparatus according to Claim 2 or Claim 3, including a feed pipe for the solutior. to be evaporated projecting into the evaporator housing and having its outlet end disposed closely above the bottom of the housing.
5. Apparatus for treating an aqueous radioactive waste solution substantially as hereinbefore described and illustrated with with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3738769 | 1987-11-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8825882D0 GB8825882D0 (en) | 1988-12-07 |
| GB2212515A true GB2212515A (en) | 1989-07-26 |
Family
ID=6340535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8825882A Withdrawn GB2212515A (en) | 1987-11-14 | 1988-11-04 | Treatment of aqueous radioactive waste solutions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2212515A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2250853A (en) * | 1990-08-31 | 1992-06-17 | Nikki Kabushiki Kaisha | Method of treating nitric acid recovered from spent nuclear fuel reprocessing process. |
| GB2273496A (en) * | 1992-12-15 | 1994-06-22 | Doryokuro Kakunenryo | Method of separating and recovering ruthenium from high-level radioactive liquid waste |
| WO2000023639A1 (en) * | 1998-10-21 | 2000-04-27 | Nicasio Paulino Mora Vallejo | Installation for the collection of liquid residues applicable to the treatment of parts by electrolytic bath |
| ES2153755A1 (en) * | 1998-10-21 | 2001-03-01 | Vallejo Nicasio Paulino Mora | Installation for recovering water from electrolytic bath effluent contains recycling chamber linked to effluent feed pump, heat exchanger for heating effluent, and suppressor for assisting effluent filtration |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1025282A (en) * | 1962-05-23 | 1966-04-06 | Michael Charles Dart | Improvements in or relating to the treatment by electrolytic oxidation of cyanide wastes |
| GB1217396A (en) * | 1968-03-29 | 1970-12-31 | Mini Of Technology | Process and apparatus for the control of flash boiling in liquid electrolytes |
| GB2039531A (en) * | 1978-12-27 | 1980-08-13 | Rowenta Werke Gmbh | Method and apparatus for controlling the deposition of boiler scale |
| SU947036A1 (en) * | 1980-05-27 | 1982-07-30 | Завод "Армхрусталь" | Process for concentrating waste sulphuric acid |
| EP0162356A1 (en) * | 1984-05-14 | 1985-11-27 | Siemens Aktiengesellschaft | Process for treating decontamination fluids containing organic acids, and device for carrying it out |
-
1988
- 1988-11-04 GB GB8825882A patent/GB2212515A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1025282A (en) * | 1962-05-23 | 1966-04-06 | Michael Charles Dart | Improvements in or relating to the treatment by electrolytic oxidation of cyanide wastes |
| GB1217396A (en) * | 1968-03-29 | 1970-12-31 | Mini Of Technology | Process and apparatus for the control of flash boiling in liquid electrolytes |
| GB2039531A (en) * | 1978-12-27 | 1980-08-13 | Rowenta Werke Gmbh | Method and apparatus for controlling the deposition of boiler scale |
| SU947036A1 (en) * | 1980-05-27 | 1982-07-30 | Завод "Армхрусталь" | Process for concentrating waste sulphuric acid |
| EP0162356A1 (en) * | 1984-05-14 | 1985-11-27 | Siemens Aktiengesellschaft | Process for treating decontamination fluids containing organic acids, and device for carrying it out |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2250853A (en) * | 1990-08-31 | 1992-06-17 | Nikki Kabushiki Kaisha | Method of treating nitric acid recovered from spent nuclear fuel reprocessing process. |
| GB2250853B (en) * | 1990-08-31 | 1994-05-18 | Nikki Kabushiki Kaisha | Method of treating nitric acid recovered from spent nuclear fuel reprocessing process |
| GB2273496A (en) * | 1992-12-15 | 1994-06-22 | Doryokuro Kakunenryo | Method of separating and recovering ruthenium from high-level radioactive liquid waste |
| WO2000023639A1 (en) * | 1998-10-21 | 2000-04-27 | Nicasio Paulino Mora Vallejo | Installation for the collection of liquid residues applicable to the treatment of parts by electrolytic bath |
| ES2153755A1 (en) * | 1998-10-21 | 2001-03-01 | Vallejo Nicasio Paulino Mora | Installation for recovering water from electrolytic bath effluent contains recycling chamber linked to effluent feed pump, heat exchanger for heating effluent, and suppressor for assisting effluent filtration |
| ES2154187A1 (en) * | 1998-10-21 | 2001-03-16 | Vallejo Nicasio Paulino Mora | Installation for recovering water from electrolytic bath effluent contains recycling chamber linked to effluent feed pump, heat exchanger for heating effluent, and suppressor for assisting effluent filtration |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8825882D0 (en) | 1988-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0771222B1 (en) | Electrochemical oxidation of matter | |
| US4849074A (en) | Method and apparatus for electrochemically decomposing inorganic materials contained in an aqueous radioactive | |
| US4351734A (en) | Spark cell ozone generator | |
| EP0111920A2 (en) | Apparatus and method for the electrolytic production of chlorine water | |
| US4058441A (en) | Process for the regeneration of spent pickling solutions | |
| GB2212515A (en) | Treatment of aqueous radioactive waste solutions | |
| US5902465A (en) | Apparatus for treating industrial waste water through electrolysis | |
| RU2286949C2 (en) | Method and the device for underwater decomposition of the organic contents of the waste electroconductive water solutions | |
| EP0524825A1 (en) | Method of treating waste liquor | |
| SU1730684A1 (en) | Method of treatment of water radioactive wastes | |
| DE69000413D1 (en) | MEMBRANE ELECTROLYSIS DEVICE AND USE THEREOF FOR REMOVING METAL IONS. | |
| KR880004500A (en) | Treatment method of contaminated phosphate solution | |
| JPS6144277B2 (en) | ||
| SU1561941A1 (en) | Method and apparatus for desinfecting liquid feed | |
| US4236982A (en) | Electrolysis of lead azide | |
| US896749A (en) | Electrochemical concentration of liquids. | |
| RU2744U1 (en) | CONTAINER FOR STERILIZATION OF A METAL MEDICAL INSTRUMENT | |
| JPH06218376A (en) | Method and apparatus for continuous decomposition treatment of nitric acid and ammonia | |
| JPS57105206A (en) | Method for removing silicon content from digested liquid of pulp | |
| JPH0262035B2 (en) | ||
| JP2000229293A (en) | Method and apparatus for treating aqueous medium | |
| EP0350248B1 (en) | Apparatus for treating photographic process waste liquor and method therefor | |
| RU2145939C1 (en) | Water treatment apparatus | |
| US5470444A (en) | Process for preparing low iron ammonium alum | |
| JPS632059B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |